The gold standard that affirmed EU was the Schengen Area

Ever European had the right to travel freely across all national borders in Europe and settle where ever he wanted. This was the Schengen thing.

Now, under new realities, there is to be a change:

https://www.aljazeera.com/news/2018/07/austria-germany-seeking-restrict-movement-schengen-180713152649565.html

All they had to do was to preserve the Schengen Area for all its documented citizen.

All migrants be denied this privilege.

It was this that the British had to leave the EU. They knew, that Britain was the gold standard of all European migrants.

England was NIRVANA. 

To reach it was to get the chance to grasp the Holy Grail of acquiring the power of the English Language. And with that a life of Freedom, Money and Glory.